Process of cracking oil



Feb. 2, EGLQFF 1,843,151

PROCESS OF CRACKING OIL Filed June 26, 1925 a??? M fi Y 1,;

Patented Feh.2, 1932 t 3 UNITE stares" PATENT-I OFFICE eusravnenorr, oncnrcaeo, ILLINOIS; assreivon ro UNIVERSAL oIL Paonucrs com- QANY; orcmoaeojrnrmors, A conrona'rron or source: mxora v or cnacxme on"Application m 2a, 1926. Serial no. 118,828.

' This inventionrelates-to.improvementsin' 1 a'..-iiree .ss r cking "hian e particularly to the treatmentof pressure distillate as part'of acontinuous.crackingiproc- :fij ess. 3 s

' The object of the invention is to treat the pressure distillate as itcomes from the top of'the dephlegmator so as to decolorize and deodorizethe pressure distillate, and-make a finished motor fuel,-as-for example,havjingan end point corresponding to gasoline. The invention willbeunderstoodfrom the following description, reference being had to theaccompanying drawing in which the single figure is a side elevationalview illustrating the apparatus.

Referring to the drawing, 1 designates a furnace-in which is mounted theheating coil 2., The transfer line 3 having'valve 4;, leads tooneendlofthe expansion chamber 5. This expansion chamber: 5, which is preferablylo cated' outside of the fire zone, as residue drawofi fifcontrolled bythe valve '7 and vapor outlet pipe 8 extending into the lower-.end ofthe dephlegmator 9 as shown. This de hle'gmator9hasthereflux condensatedrawo pipe 10v havingvalve 11, and may be provided with hot oil pump 12leading to the main feed line 13. The feed line 13-may be'supplied withraw oil through the pump 14 leading to any suitable source of supply.The vapors pass out of the top of the dephlegmator through the pipe 15controlled by the valve- 16. Instead however, of passing directly to thewater condenser, or to another fractionating tower as is the casein thecracking processes now in use, I pass the hot vapors from the top of thedephlegmator through a filter press 17, which filter press may be of theconventional type, using layers of filtering 7 material such as fullersearth, diatomaceous earth or the like. If desired, a hot vapor pump 18may be interposed in the line 15 so as to put the filter press under ahigher ressure than the balance of the system. owever, the pum may beby-passedin an obvious manner, i desired. As the vapors pass 1 throughthe filter press, they are decolorize'd and deodorized.

g9 They then pass either directly to the water condenser and receiver,or if desired, may pass through the line 19 having the valve 20,

a fractionatin'g tower 22 having liquid draw- Off 23 controlled by thevalve 24am vapor outlet pipe 25 controlled by the valve 26 leading tothe water condenser 27 and thence to the receiver 628. This receiver 28maybe equipped'with gas outlet pipe 29 controlled by the valve 30,liquid drawofi pipe'3'1 corito astill 21, which still 21 equipped withtrolled by the valve 32'. The still may have residue drawofi 33cont-rolled by the valve'34.

By suitably regulating the valve 20, the pressure on the vapors or oilas they enter the still may be substantially reduced, thus causing theoil to flash, and the lightest or having an end point corresponding togasoline portions thereof pass through the tower into the receiver. Ifdesired, the still, 21

may be externally heated as the filter press might in some cases becooled, andthe oil comes from the filter press in more or less liquidcondition. f If desired, the vapors from the dephlegmator may be cooledto liquid form beforethey enter the filter press.

The arrangement is such that the entire sys tem may be maintained underuniform pressure of say 200 pounds, or the filter press may bemaintained under higher pressure than the preceding part of theapparatus, as for example,-800 pounds, and the gasoline still may bemaintained under a pressure of 50- pounds or atmospheric. I claim as myinvention: A

1. -A method for refining the vaporous h drocarbon mixture issuing froman .oilcraching process which comprises dephlegmating said mixture andcondensing therefrom fractions heavier than-gasoline while retaining thegasoline hydrocarbons in vapor form, in creasing the pressure on saidgasoline hydrocarbons and passing the same under the increased pressurethrough a decolorizing and deodorizing filtering agent.

2. A method for refining the vaporous hydrocarbon mixture issuing froman oil cracking process which comprises dephlegmating said mixture andcondensing therefrom fractions heavier than gasoline while retaining thegasoline hydrocarbons in vapor form,

pass the line va is under ressure throl l gi a dec fii izingalllldeodo'rizil g filtering agent, cooling t e 'vapors during theirpassage through said agent thereby render- 5 ing the same more or lessliquid passin the liquid to a' distillation zone mamtaine un-t der lowerpressure than the filtering stage whereby distillation therein isfacilitated by I the pressure reduction, and condensing the vaporsevolved in said distillation zone.

' GUSTAV EGLOFF.

